here's some unusual electrical components. these are tone reeds. they're used in older radio equipment, such as public safety radios and ham radios. they are used to send or receive CTCSS tones. let's take one apart!pic.twitter.com/rgWOvnv2VZ
U tweetove putem weba ili aplikacija drugih proizvođača možete dodati podatke o lokaciji, kao što su grad ili točna lokacija. Povijest lokacija tweetova uvijek možete izbrisati. Saznajte više
here's the motorola datasheet, surprisingly still hosted on their website. https://www.motorolasolutions.com/content/dam/msi/docs/en-xw/static_files/Related_-_Vibrasender_and_Vibrasponder_devices.pdf …
One of my first ham radios was an E.F. Johnson Fleetcom II which I retuned to put on a local 440MHz band repeater. I had to order new custom crystals for the channel frequency.
digital stuff spoils us so much
Oh God, the memories. Our GE Mastr Pro mobiles had a box about half the size of a brick on the console in the car that was the CG encoder that generated the tones. 5-position switch, A B C D E. We were Company "C", so used the C position that generated our tone, 151.4 . (more)
One of the first things they put me to doing when they hired me was to sit me at the bench with a pile of bad ones for me to fix. Troopers would call us up and say "my radio won't talk" and we'd tell them to put their CG box back to "C". (more)
Later, the NE567 and others came along and made the mechanical parts obsolete. Still exciting analog stuff. Nowaways, everything vanished into a black chippy and the only exciting thing would be looking at the code of the working software detection. Kinda boring.
But that's boring.
To think that was somehow more cost effective than a tuned circuit
It's amazing that it was once cheaper to do this mechanically than with a simple oscillator!
Twitter je možda preopterećen ili ima kratkotrajnih poteškoća u radu. Pokušajte ponovno ili potražite dodatne informacije u odjeljku Status Twittera.